As for a sweet spot on the loading of a rig I have never seen that. But I have always had 2-3 time the audio capability of what was needed. I believe in running a rig loaded to much less than the total audio that I have available.
One thing that is for sure, there is a sweet spot for loading on tetrode/pentode finals because of the screen voltage on the RF final and how it gets modulation. This sweet spot has all to do with distortion where the RF output needs to follow the modulation voltage as it is applied to the final plate and screen. This is best seen on trapezoid pattern display. Adjust the screen voltage and screen modulation percentage with respect to the plate modulation percentage while looking for straight edges on the trap pattern. On tetrode finals it is best to reduce the plate and screen voltage together but it is really very seldom necessary. John, WA5BXO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
